ltm4646 no output voltage. Schematic help.

Question

There is no output voltage on both channels, but there is voltage on the output of powerGood. Could this be a consequence of a forgotten resistor on the Rfreq pin?
I don’t understand how PG can be, but there is no output voltage.

yanliang · Accepted Answer

You are right. CPWR provides power to control circuit and it needs to be connected to Vin. A frequency set resistor is also needed at the FREQ pin. DRVCC pin needs a 4.7uF decoupling cap that puts close to this pin.)

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ltm4646 no output voltage. Schematic help.